/*
 * Copyright 2002-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package sample.web.reactive;

import org.springframework.core.MethodParameter;
import org.springframework.stereotype.Component;
import org.springframework.ui.ModelMap;
import org.springframework.web.reactive.result.method.BindingContext;
import org.springframework.web.reactive.result.method.HandlerMethodArgumentResolver;
import org.springframework.web.server.ServerWebExchange;

import reactor.core.publisher.Mono;

/**
 * Demos a custom {@link HandlerMethodArgumentResolver}.
 *
 * @author Rob Winch
 */
@Component
public class CustomHandlerMethodArgumentResolver
		implements HandlerMethodArgumentResolver {

	@Override
	public Mono<Object> resolveArgument(MethodParameter param,
			BindingContext bindingContext, ServerWebExchange exchange) {
		return Mono.just(new CustomArgument(exchange.getRequest().getQueryParams().getFirst("content")));
	}

	@Override
	public boolean supportsParameter(MethodParameter param) {
		return CustomArgument.class.isAssignableFrom(param.getParameterType());
	}
}
